Timber holder



June 1959 1.. s. HOLMBOE, JR 2,891,758

TIMBER HOLDER Filed April 13, 1955 12 I I IO I I 2 'lmlllh l g a M LVWJF165. l FIG. 2 F166 INVENTOR- United States Patent Ofifice 2,891,758Patented June 23, 1959 TIMBER HOLDER Lawrence S. Holmboe, Jr., OklahomaCity, Okla.

Application April 13, 1955, Serial No. 501,116

2 Claims. (Cl. 248-357) The present invention relates to theconstruction of buildings, and the like, and more particularly to atimber holder or inter-connector in the supporting of scaffolding,concrete forms, staging, and the like, as used in connection withconstruction work.

As is the practice in constructing forms for concrete in buildingbridges, buildings, etc., a sturdy support must be provided to hold theconcrete. The horizontal supporting cross-members are referred to aspurlins and the vertical supports are referred to as shores.

The principal object of the present invention is to provide a means forholding the upper end of a shore in place adjacent the under side of apurlin to prevent lateral movement of the shore relative to the purlin.

A similarly important object is to provide a means for holding the upperend of a shore in position relative to the purlin when the purlin hasbeen raised from contact with the upper end of the shore.

Another object is to provide a means of connection between a shore and apurlin which may be made by only one workman from the ground floor.

A further object is to provide a means for connection between a shoreand a purlin without nailing a sea or short dimension of lumber, on theconnecting members.

An additional object is to provide an inter-connector or timber holderwhich is light and simple in construction, yet strong and sturdy andcomparatively cheap to manufacture.

Yet another object is to provide an inter-connector which may be easilyattached to and removed from the upper end of a shore.

The present invention accomplishes these and other objects by providinga pair of elongated substantially fiat members of resilient materialwhich are substantially straight throughout substantially one half theirlength and are perforated intermediate the ends of the straight portionfor being rigidly connected in parallel longitudinal relation toopposing sides of the upper end portion of a shore, as by nailing. Thefree end portions of the members extend upwardly above the upper end ofthe shore and are arcuately curved to substantially describe an S- shapefor co-operatively frictionally engaging opposing sides of a purlintherebetween.

Other objects will be apparent from the following description when takenin conjunction with the accompanying one sheet of drawings, wherein:

Figure 1 is a perspective view of one of the devices, per se;

Figure 2 is a fragmentary elevational view of a pair of the devicesinstalled on a shore and illustrating, in dotted lines, the connectingaction of the devices with a purlin, the purlin being shown incross-section;

Figure 3 is a fragmentary side elevational view of the installation ofFig. 2;

Figure 4 is a horizontal cross-sectional view of one of the devicestaken substantially along line 4-4 of Fig. 3;

Figure 5 is a fragmentary elevational view similar to Fig. 2illustrating a shore connection with a purlin which is laterally widerthan the shore, the shore and purlin being shown in dotted lines.;

Figure 6 is a fragmentary elevational view similar to Fig. 5illustrating a shore connection with a purlin which is laterallynarrower than the shore, the shore and purlin being shown in dottedlines.

Like characters of reference designate like parts in those figures ofthe drawings in which they occur.

In the drawings 2 Referring more particularly to Fig. 1 the referencenumeral 10 indicates one of the devices, per se, which is an elongatedstrap-like member preferably of resilient material.

The device 10 is rectangular in cross-section in its preferredembodiment but may well be circular, elliptical or of any desired shape.As shown it is transversely flat between its edges. The member 10 issubstantially straight for substantially one half its length as at 12.At a point intermediate its ends the member 10 is arcuately curved awayfrom the plane of the straight portion 12, as at 14 then curved back andacross the plane of the straight portion forming a reverse curve, as at16, and then reverse curved, as at 18, in the same direction as thefirst curve 14 to its end 20, thus forming substantially an S-shape forsubstantially one half the length of the member. In the usual parlancethe shape is referred to as a flat S. The curve 16 and the end 20 lie onone side of the plane of the straight portion 12 and the reverse curve18 lies on the opposite side of the plane of the straight portion forthe purposes more fully explained hereinbelow.

Longitudinally disposed on the curved portion 18 are preferably twoparallel comparatively short substantially V-shap'ed ridges 22, see Fig.4, integral with the member 10 for the purposes which Will presently beapparent.

Adjacent each respective end of the straight portion 12 the member 10 isthrough perforated, as at 24 and 26. The size of the perforations 24 and26 is such that they freely receive a nail or the like for connectingthe straight portion 12 flatly to a shore.

Referring now more particularly to Figs. 2 and 3, the reference numeral30 indicates the lower one and the numeral 31 indicates the upper one ofa pair of vertically disposed shores with the shore 31 held in verticalslidable relation with the shore 39 by a pair of shore clamps 33 and 34.The shores 30 and 31 are of conventional four by four sizecross-sectionally of any desired length with the shore 31 disposed belowa purlin 35 of equal crosssectional area with relation to the shores.One of the members 10 is connected to each of a pair of opposite sidesof the upper end portion of the shore 31 parallel with the verticalsides of the purlin 35, forming a cooperating pair of the members 10,which is the preferred arrangement. Each member 10 is longitudinallydisposed centrally of its respective side of the shore 31, see Fig. 3,with the curve 14 in close spaced relation below the upper end 36 of theshore 31 and with the ends 20 disposed outwardly from the sides of theshore. The members 10 are rigidly held in this position by double headednails 37 driven into the shore through the perforations 24 and 26,respectively. The use of double headed nails facilitates the removal ofthe members 10 from the shore. Each member 10 projects beyond the end 36of its shore a distance less than the normal thickness of a conventionalpurlin so that its movement vertically over the sides of the latter isnot terminated by abutting any concrete form sheathing extending acrossthe top of the purlin.

The shore 31 is then manually pushed upwardly in sliding relation to theshore 30 until the end 36 contacts the under surface of the purlin 35.As the shore 31 is raised the outwardly curved end portions of themembers 10 contact opposing sides of the purlin and resiliently springoutwardly until the ridges 22 on the curved portion 18 of eachrespective member are in contact with opposing sides of the purlin 35.The length of the substantially S-shaped portion of each respectivemember 10 is such that with the upper end 36 of the shore contacting thepurlin 35 the ridges 22 are substantially midway of the vertical sidesof the purlin. The resilience of the members 10 is preferably such thatthe ridges 22 slightly bite into the wood of the sides of the purlin.This is desirable in order to prevent lateral movement of the members 10and to maintain the shores in vertical position when, through jackingoperations for leveling the purlins, the same may be raised out ofcontact with the ends of the shores.

In Fig. 5 is illustrated how the S-shaped portions of the members may bealtered to accommodate a purlin 40 which is of greater cross-sectionalarea than is the shore 31.

Fig. 6 illustrates the manner of altering the S-shaped portions of themembers 10 to grip a purlin 42 which is narrower cross-sectionally thanis the shore 31.

Gbviously the invention is susceptible to some change or alterationwithout defeating its practicability, and I therefore do not wish to beconfined to the preferred embodiment shown in the drawings and describedherein, further than I am limited by the scope of the appended claims.

I claim:

1. In combination with a vertical shore formed of wood of rectangularcross-section having a flat upper end for supporting a substantiallyhorizontal purlin, of means for resiliently holding said shore andpurlin together including pair of elongated resilient straps each havinga trans versely flat inner face, and a portion of the order of half thestrap length longitudinally fiat and attached to opposite sides of theshore below the said end, the remainder of each strap being first bentaway from the plane of its shore side and thereafter forming a fiat 8curve above the shore end, twice crossing the plane of said side andterminating outside of it a distance above the said end less than thedistance between the upper and lower purlin surfaces, whereby the twostraps form a divergent purlin entrance, each of said straps on thefacing longitudinal convex areas below said entrance havinglongitudinally disposed integral ridge means to grip the purlin andprevent lateral movement of the shore in respect thereto.

2. A timber holder comprising in combination a shore post of rectangulartimber having a flat end for supporting a horizontal purlin ofrectangular timber, a pair of elongated transversely flat members ofresilient metal each having a straight portion at one end, fasteningmeans rigidly securing said portions flatly to opposite sides below theone end of said shore post, said members extending from said post beyondsaid end substantially one-half their length, said members beingarcuately curved outwardly from the planes of said sides before reachingthe end of said shore, said members being then reverse curved inwardlyto cross the planes and then curved outwardly again crossing the planesto form arcuate diverging ends; and at least one integral longitudinallydisposed sharp ridge formed on the inwardly facing curved portion withinthe said plane of each said member, whereby upon upward movement of saidshore to contact the under surface of a purlin said diverging endsco-operatively resiliently contact opposing sides of said purlin tospread the said members for engagement of the purlin sides by theinwardly facing curved portions to frictionally grip the same by theridges thereon thereby preventing lateral movement of said members alongthe sides of said purlin.

References Cited in the file of this patent UNITED STATES PATENTS118,698 Denton Sept. 5, 1871 1,685,445 Bash Sept. 25, 1928 FOREIGNPATENTS 104,547 Switzerland Ian. 17, 1924

